If your mom was always telling you to sit up straight, she would probably approve of the All33 Backstrong C1. Forcing you upright is how this clever office chair distinguishes itself from the many other miracle-promising chairs out there — but not in a rigid, eat-your-vegetables, unpleasant kind of way, as it may sound; it’s actually comfortable. Is it the ergonomic solution to every problem in your life? No. But the All33 just might help in some ways and will at least be a solid office chair while doing it.
All33 currently makes one product with one defining feature. Based on a chiropractor’s prototype, the Backstrong C1 stands out from the crowd with its bucket-like seat that swivels with your pelvis independently from the rest of the chair’s frame, more or less preventing you from slouching. It’s one of those concepts that sounds simple and possibly gimmicky, but here’s the thing: it kinda works.

All33 Backstrong C1 Chair
What’s Good
It works: The All33 genuinely forces you to sit up straight. As you sit in it for the first time, it’s tough to figure out exactly how it’s doing this even as you can feel it happening. You’ve got to sit with your butt all the way back and the smooth curve of the bucket will firmly support your lower back (lumbar). If you try to rotate your pelvis or bend your lower back, the hinges seem to counter your motion using your own weight. The result is near perfect posture, and just about anyone can probably benefit from that (not just those with posture problems or sore backs).
It’s sturdily built: The tolerances are tight, construction feels solid and all the moving parts function smoothly with satisfying action. Some reviewers complained that the chair was loud, we didn’t experience any such problems with our completely silent tester model. There’s nothing more to say about its overall build quality, and that’s a good thing.